#include <iostream>

using std::cout;
using std::cin;
using std::endl;

int main()
{
    char a[200] = {0};
    //自定义空格作为一行的分隔符
    cin.getline(a, 200, ' ');
    //cin.getline(a, 200);
    cout << "a:" << a << endl;

    return 0;
}

